Determination of the Δ++ magnetic dipole moment
We study the elastic and radiative π<SUP>+</SUP>p scattering within a full dynamical model which incorporates the finite width effects of the Δ<SUP>++</SUP>. The scattering amplitudes are invariant under contact transformations of the spin 3/2 field and gauge-invariance is fu...
Guardado en:
| Autores principales: | , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2001
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/84846 |
| Aporte de: |
| Sumario: | We study the elastic and radiative π<SUP>+</SUP>p scattering within a full dynamical model which incorporates the finite width effects of the Δ<SUP>++</SUP>. The scattering amplitudes are invariant under contact transformations of the spin 3/2 field and gauge-invariance is fulfilled for the radiative case. The pole parameters of the Δ<SUP>++</SUP> obtained from the elastic cross section are m<SUB>Δ</SUB> = (1211.2±0.4) MeV and Γ<SUB>Δ</SUB> = (88.2±0.4) MeV. From a fit to the most sensitive observables in radiative π<SUP>+</SUP>p scattering, we obtain μ<SUB>Δ</SUB> = (6.14±0.51)e/2m<SUB>p</SUB> for the magnetic dipole moment of the Δ<SUP>++</SUP>. |
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